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| 🔷Shapes | Straight tube, U-shaped tube, spiral tube, and customized special structures. |
| 📐Sizes | Outer diameter 10mm–500mm, wall thickness 1mm–20mm, length 100mm–6000mm (per customer drawings). |
| ⚙️Features | Flange connection, closed end, quartz flange, and vacuum-sealed design available. |
| ✨Surface Treatment | Polished (inner/outer), frosted, or acid-etched surface. |